The team of future id Software employees, still working for Softdisk, then recreated the entire Mario game, hoping that Nintendo would license the game for the PC.
Nintendo declined the offer to release the game after id Software finished it.
The provider object receives data requests from clients, performs the requested action, and returns the results.
This object has methods that call identically-named methods in the provider object, an instance of one of the concrete subclasses of .
This allows sprites to be animated independently of the scrolling with minimal computational effort.
Since moving a sprite in this way involves first erasing it and then redrawing it, the image of the erased sprite may be visible briefly, causing flicker.
A content provider manages access to a central repository of data.